Graco 166510 Piston

The Graco 166510 Piston is a durable OEM pump component designed to restore smooth stroke performance and maintain reliable fluid delivery.

Fits Pump Model 904287
Stainless-steel construction
Ensures consistent pump output

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Description

Graco 166510 Piston – Pump Replacement Component

Compatible Machines

Graco Displacement Pump Model 904287 (Short-Stroke)

The Graco 166510 Piston is a precision-built pump piston designed for maintaining smooth fluid operation inside compatible Graco displacement pumps. It restores proper pumping action, ensures accurate stroke performance, and helps maintain long-term reliability of your sprayer’s pump assembly.

Pump Model	Part Number	Notes
904287	166510	Short-Stroke Displacement Pump (verified compatibility)

Product Overview

This piston is constructed for durability and proper pump stroke control. It fits directly into the pump assembly where accurate piston movement is essential for output consistency. Replacing a worn piston helps prevent pressure loss, uneven spray patterns, and wear on packings.

Key Features

OEM replacement piston for displacement pump assemblies
Ensures proper stroke action and fluid movement
Improves spray consistency and pump reliability
Stainless-steel construction for extended service life

Frequently Asked Questions

If your pump shows reduced output, inconsistent pressure, or visible scoring on the piston rod, it is recommended to replace the piston to restore smooth pump performance.

This piston fits the Graco 904287 displacement pump. It is not used in contractor-grade sprayers such as Ultra, 390, 395, or Magnum units unless they explicitly use this specific pump assembly.

Yes, if you are familiar with pump maintenance. Always depressurize the system, follow the pump service manual, and check the cylinder for damage before installing the new piston.